Wera Tools - 932/918/6 Screwdriver set Kraftform Wera: Chiseldriver and rackWera Chiseldriver for fastening, chiselling and loosening seized screws. Multi component Kraftform handle for fast and low fatigue working. Kraftform Plus: hard gripping zones for high working speeds whereas soft zones ensure high torque transfer. A hexagon blade out of high quality bit material that extends right through the blade ensures full transfer of force, even when struck with a hammer. The ductile tempered material prevents the blade from